5.History or presence of any clinically significant gastrointestinal, cardiovascular, hepatic, renal, haematological, endocrine, respiratory, neurological or psychiatric disease 6.History of primary insomnia (DSM IV-TR criteria) within the past 6 months. 7.The subject has used any medication with psychotropic effects (e.g. antidepressants, anxiolytics, antihistamines) within 30 days of the initial visit.